A proton is projected with speed v in magnetic field B of magnitude 1 T if angle between velocity and magnetic field is 60° as shown below. Kinetic energy of proton is 2 eV (Mass of proton = 1.67 × 10–27 kg, e = 1.6 × 10–19 C). The pitch of the path of proton is approximately
(1) 6.28 × 10–2 m
(2) 6.28 × 10–4 m
(3) 3.14 × 10–2 m
(4) 3.14 × 10–4 m
